HDMIis the default wired audio and video connection protocol for home theaters.
It can send control signals between connected devices.
This is referred to by several names depending on the manufacturer.
MHL Consortium
Still, its generic name isHDMI-CEC.
Another HDMI feature is ARC (audio return channel).
MHL uses the same physical end-connector HDMI uses, but it’s not HDMI.
MHL Consortium
It transmits HD video and audio from a connected equipment while charging that equipment at the same time.
Certain smartphones and tablets support MHL, as do select TV sets.
It also adds 3D compatibility.
MHL Consortium
It also supports object-based audio formats like Dolby Atmos and DTS:X.
This is referred to as MHL Alt (Alternate) Mode.
This means the USB 3.1 bang out-C connector is compatible with both USB and MHL functions.
The MHL Consortium and Lattice Semiconductor
MHL-enabled USB ports can use both USB or MHL functions.
One additional MHL Alt Mode feature is the Remote Control Protocol (RCP).
RCP enables MHL sources plugged into compatible TVs to operate using the TV’s remote control.
HDMI Consortium
The decision to implement MHL Alt Mode on a specific product is determined by the product manufacturer.
To dig deeper into the technical aspects of MHL technology, check outthe official MHL Consortium website.
